doors. and anyone that wants to protect their valuables, like a watch or iphone, can just mark them with the paint. if stolen and found, the dna-like fingerprint on the chemicals can help police find the owner. so, logan, this has really led to a lot of convictions worldwide. >> yes, in fact, over 1,200 convictions in the uk and europe alone in the last 17 years. >> reporter: and other companies are developing similar chemicals, but this is so new to the u.s., we're told law enforcement agencies across the country are just now looking into how it can be used to fight crime, david. >> many convictions already. gio, thank you. when we come back here on "world news," look at this tonight. the new high rise, $120 million to build. so, how on earth could they forget the most important thing. so, how on earth could they forget the most important thing. is the building useless tonight? drinks, eats. i have very well fitting dentures. i like to eat a lot of fruits. love them all. the seal i get with the super poligrip free keeps the seeds from getting up underneath. even well-fitting dentures let in food particles.